I would, but I just switched to LibreWolf, and in the process, my settings got wiped out, so I’m still rebuilding.

Surprisingly, there’s still plenty of websites that don’t need much JavaScript at all, so I think it’s better to just start fresh for your personal use.

NoScript is pretty straightforward. Default behavior is to block most JavaScript, but they have a few that have been let through to keep the web mostly functioning. You can go into settings and change the default behaviors or just ignore all that and start whitelisting things as you go.